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ground based arrays. The telescopes will be larger, but with 

 the expected assembly capability available on the space station, 

 diameters of the order of 100 meters should be technically 

 feasible at working wavelengths down to 7 millimeters and 

 perhaps even as short as 3 millimeters. The present planners 

 are considering various configurations of 3 to 10 telescopes in 

 orbits extending to millions of kilometers. The technologies 

 required seem to be reasonable extensions of present day 

 capabilities. With the Japanese and Europeans joining in the 

 space station effort, it is not unreasonable to look for their 

 cooperation in the conduct of these futuristic, scientific 

 missions which require the support capabilities of the space 

 station for assembling, servicing, refurbishment, etc. 



Geophysics 



Turning now to the broad discipline of geophysics, let me 

 recall some of the background of the International Geophysical 

 Year (IGY) which was the forerunner of all internationally 

 cooperative geophysics in the past quarter century and still is 

 the best model for future global programs. 



With the end of World War II, American, British, French and 

 Soviet scientists undertook high altitude research with 

 rockets. The prospects of achieving earth orbiting satellites, 

 combined with a grand campaign of rocket and balloon experiments 

 and supporting ground base studies sparked the enthusiasm of 

 geophysicists around the world. With American leadership, the 

 idea of the IGY was brought before the International Council of 



